Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Like this presentation? Why not share!

3,334 views

Published on

student presentation

general physics 1

Presentation 2 group 5

Physics Nobel Prize Winner

21 Feb 2009

Published in:
Education

No Downloads

Total views

3,334

On SlideShare

0

From Embeds

0

Number of Embeds

41

Shares

0

Downloads

0

Comments

0

Likes

5

No embeds

No notes for slide

- 1. Max Planck
- 2. Content Bibliography Work life Physic Theory
- 3. Bibliography <ul><li>-Was born in Kiel, Germany, </li></ul><ul><li>on April 23, 1858 </li></ul><ul><li>-Studied at the University </li></ul><ul><li>of Munich and Berlin </li></ul>- His father was Professor of Constitutional Law in the University of Kiel - R eceived his doctorate of philosophy at Munich in 1879
- 4. Work life <ul><li>Planck's earliest work was on the subject of thermodynamics </li></ul><ul><li>He published papers on entropy, on thermoelectricity and on the theory of dilute solutions . </li></ul><ul><li>From these studies he was able to deduce the relationship between the energy and the frequency of radiation . </li></ul>
- 5. W ork Life <ul><li>Experimental observations was on the wavelength distribution of the energy emitted by a black body. </li></ul><ul><li>He came up with idea that the energy emitted by a resonator could only take on discrete values or quanta . </li></ul><ul><li>The energy for a resonator of frequency v is hv where h is a universal constant, now called Planck's constant . </li></ul>
- 6. W ork Life <ul><li>So basically , Planck was known for Planck’s constant, Planck’s postulate and Planck’s law of black body radiation </li></ul><ul><li>He got a Nobel prize in 1918 </li></ul><ul><li>He died on October 4 th in the year 1947 when he was 89 </li></ul>
- 7. Max Planck’s Works and Discoveries As Planck w as conducting an experiment, he found that experimental observations on the wavelength distribution of the energy emitted by a black body as a function of temperature were inconsistent with the predictions of classical physics . However, he was able to deduce the relationship between the energy and the frequency of radiation . In 1900, he announced his derivation of the relationship that the energy emitted by a resonator could only take on discrete values or quanta . The energy for a resonator of frequency v is hv where h is a universal constant, now called Planck's constant .
- 8. Planck’s Works -Planck’s law of Black-body radiation -Planck’s Constant -Planck Postulate
- 9. What is Black body? A black body is an object that absorbs all electromagnetic radiation that falls on it . No electromagnetic radiation passes through it and none is reflected. Because no light ( visible electromagnetic radiation ) is reflected or transmitted. A black body at temperature T emits exactly the same wavelengths and intensities which would be present in an environment at equilibrium at temperature T , and which would be absorbed by the body . Since the radiation in such an environment has a spectrum that depends only on temperature, the temperature of the object is directly related to the wavelengths of the light that it emits . The light emitted by a black body is called black-body radiation .
- 10. Pl anc k’s law of Bla ck-body radiation <ul><li>Planck's law describes the spectral radiance of electromagnetic radiation at all wavelengths from a black body at temperature T . As a function of frequency ν , Planck's law is written as: </li></ul><ul><ul><li> </li></ul></ul><ul><li>This function represents the emitted power per unit area of emitting surface, per unit solid angle, and per unit frequency . </li></ul><ul><li>where, </li></ul><ul><ul><ul><ul><li> is the amount of energy per unit surface area per unit time per unit solid angle emitted in the frequency range between ν and ν+dν by a black body at temperature T ; </li></ul></ul></ul></ul><ul><ul><ul><ul><li> is Planck's constant ; </li></ul></ul></ul></ul><ul><ul><ul><ul><li> is the speed of light ; and </li></ul></ul></ul></ul><ul><ul><ul><ul><li> is Boltzmann's constant. </li></ul></ul></ul></ul>
- 11. <ul><li>Intensity of light emitted from a black body at any givenfrequency . Each color is a different temperature . Planck was the first to explain the shape of these curves . </li></ul>Intensity of light emitted from a black body at any given frequency . Each color is a different temperature . Planck was the first to explain the shape of these curves .
- 12. Planck’s Constant <ul><li>The Planck ’s constant ( denoted h ) , is a physical constant used to describe the sizes of quanta in quantum mechanics. It is named after Max Planck , one of the founders of quantum theory . The Planck constant is the proportionality constant between energy ( E ) of a photon and the frequency of its associated electromagnetic wave ( ν ). This relation between the energy and frequency is called the Planck relation . </li></ul><ul><li> </li></ul>erg.s 6.626 068 85 ( 33 ) ×10 −27 eV.s 4.135 667 33 ( 10 ) ×10 −15 J.s 6.626 068 96 ( 33 ) ×10 −34 Units Values of h
- 13. A closely related constant is the reduced Planck constant , denoted ħ ("h-bar") , which is equal to the Planck constant divided by ( or reduced by ) 2 π. T he reduced Planck constant is used when frequency is expressed in terms of radians per second instead of cycles per second . The expression of a frequency in radians per second is often called angular frequency ( ω ) , where ω = 2 π ν .
- 14. Planck Postulate <ul><li>The Planck ’s Postulate was used by Planck in his derivation of his law of black body radiation in 1900 . It is the postulate that the energy of oscillators in a black body is quantized by : </li></ul><ul><li>where n = 1, 2, 3, ... , h is Planck's constant , and ν is the frequency . </li></ul><ul><li>This assumption allowed Planck to derive a formula for the entire spectrum of a black body. </li></ul>Planck's postulate was further applied to understanding the Compton effect , and was applied by Niels Bohr to explain the spectrum of the hydrogen atom and derive the correct value of the Rydberg constant. Moreover, Einstein used and adapted the Planck postulate to explain the photoelectric effect .
- 15. <ul><li>http :// nobelprize . org / nobel_prizes / physics / laureates / 1918 / planck - bio . html </li></ul><ul><li>http :// nobelprize . org / nobel_prizes / physics / laureates / 1918 / planck - bio . html </li></ul><ul><li>http :// en . wikipedia . org / wiki / Black_body#Equations_governing_black_bodies </li></ul><ul><li>http :// en . wikipedia . org / wiki / Planck%27s_law_of_black - body_radiation </li></ul><ul><li>http :// en . wikipedia . org / wiki / Planck%27s_constant </li></ul><ul><li>http :// en . wikipedia . org / wiki / Planck_postulate </li></ul>References

No public clipboards found for this slide

Be the first to comment